Abstract: An electrical connector device has a slot or opening therein for receiving an end portion of an electric current carrying line such as a conductor cable, wire or bus bar and, on such insertion, engage and push-back a slidable, piston-like, slidable control valve element against forwardly pressing spring-loading thereon to apply fluid pressure to and activate a clamping plunger-like latching element. The latching element engages and clamps the conductor end portion against a wall portion of the device in an efficient, electrical connecting relation within the device. Fluid, such as air under pressure may be applied continuously to the device and may, in accordance with one aspect of the invention, be continuously exhausted until an electric line is inserted for connection therein. A push-in element or plunger enables a quick release of fluid pressure and a corresponding quick release of the electric line when it is to be detached from a tight, electrically-efficient, clamping connection within the device.

Abstract: A programmable electronic control system is provided to control the feed devices which supply different threads at different speeds in a spinning or twisting machine in order to produce yarn with special effects of color or shape at intervals along the yarn. The control system is supplied with clock pulses synchronous with the machine at intervals corresponding to a unit length of the basic thread feed. The length of a program module is determined by a settable pulse divider operating on the clock pulses and the resulting pulses are fed to a settable counter which determines the points in the module at which changes take place. Provision is made for repetition of program units a selected number of times and for interruption of the program at a random point.